Helical Fermi Arc in Altermagnetic Weyl Semimetal

Abstract

We investigate the topological properties of modified Dirac Hamiltonians with an altermagnetic mass term and reveal a novel mechanism for realizing altermagnetic Weyl semimetals. Unlike the conventional Wilson mass, the altermagnetic mass drives direct transitions between nontrivial Chern phases of opposite sign and fundamentally reshapes the band inversion surface. By extending this framework to three dimensions, we construct a minimal lattice model that hosts pairs of Weyl nodes as well as coexisting helical Fermi arcs with opposite chirality on the same surface, which is a phenomenon not found in conventional magnetic Weyl semimetals. We further propose a practical scheme to realize these phases in multilayer structures of 2-dimensional Rashba metal with engineered $d$-wave altermagnetic order. Our results deepen the theoretical understanding of mass terms in Dirac systems and provide concrete guidelines for the experimental detection and realization of altermagnetic Weyl semimetals.

References in corpus (41)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Weyl Semimetal in a Topological Insulator Multilayer
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Crystal Hall effect in Collinear Antiferromagnets
• Topological quantization of the spin Hall effect in two-dimensional paramagnetic semiconductors
• Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
• Evidence for Magnetic Weyl Fermions in a Correlated Metal
• Efficient Electrical Spin-Splitter Based on Non-Relativistic Collinear Antiferromagnetism
• Observation of spin splitting torque in a collinear antiferromagnet RuO2
• Anomalous Hall Effect in Weyl Metals
• Giant and tunneling magnetoresistance effects from anisotropic and valley-dependent spin-momentum interactions in antiferromagnets
• Chiral anomaly and transport in Weyl metals
• Observation of spin-splitter torque in collinear antiferromagnetic RuO${}_2$
• Time-Reversal-Breaking Weyl Fermions in Magnetic Heusler Alloys
• Time-reversal invariant realization of the Weyl semimetal phase
• Bottom-up design of spin-split and reshaped electronic band structures in spin-orbit-coupling free antiferromagnets: Procedure on the basis of augmented multipoles
• Chiral gauge field and axial anomaly in a Weyl semi-metal
• Adler-Bell-Jackiw anomaly in Weyl semi-metals: Application to Pyrochlore Iridates
• Discovery of a metallic room-temperature d-wave altermagnet KV2Se2O
• dc Josephson Effect in Altermagnets
• Topological Superconductivity in Two-Dimensional Altermagnetic Metals
• Topological Imbert-Fedorov shift in Weyl semimetals
• Altermagnetic superconducting diode effect
• Orientation-dependent Josephson effect in spin-singlet superconductor/altermagnet/spin-triplet superconductor junctions
• Field-free Josephson diode effect in altermagnet/normal metal/altermagnet junctions
• Magnetic Weyl semimetal in K${}_2$Mn${}_3$(AsO${}_4$)${}_3$ with the minimum number of Weyl points
• Spin Splitting Nernst Effect in Altermagnet
• Altermagnetism-Induced Parity Anomaly in Weak Topological Insulators
• Emergent Energy Dissipation in Quantum Limit
• Interplay of Altermagnetic Order and Wilson Mass in the Dirac Equation: Helical Edge States without Time-Reversal Symmetry
• Quantum Anomalous Hall Effect in Ferromagnetic Metals
• Interplay between altermagnetism and topological superconductivity on an unconventional superconducting platform
• Field-sensitive dislocation bound states in two-dimensional $d$-wave altermagnets
• The type-I antiferromagnetic Weyl semimetal InMnTi${}_2$
• Observation of 1D Fermi arc states in Weyl semimetal TaAs
• Quantum spin Hall effect in bilayer honeycomb lattices with C-type antiferromagnetic order
• Tunable two-dimensional Dirac-Weyl semimetal phase induced by altermagnetism

Cited by in corpus (4)

• The emergence of net chirality in two-dimensional Dirac fermions system with altermagnetic mass
• Anti-higher-order Weyl semimetal
• Second-order topological insulator induced by compensated altermagnetism without bulk spin splitting
• Quantum anomalous Hall effect in chiral semimetals